载营魄抱一，能无离乎？专气致柔，能婴儿乎？涤除玄览，能无疵乎？When carrying on your head your perplexed bodily soul/ Can you embrace in your arms the One and not let go? /In concentrating your breath can you become as supple /As a babe? /Can you polish your mysterious mirror / And leave no blemish?
『说文解字』“數飛也。”，小鸟反复地试飞。甲骨文是上面一个羽毛的“羽”字，下面一个日，其意为小鸟振翅日有所进。